<template>
    <div class="app-container">
        <el-input v-model="filename" placeholder="Please enter the file name (default file)" style="width:300px;" prefix-icon="el-icon-document"></el-input>
        <el-button :loading="downloadLoading" style="margin-bottom:20px;" type="primary" icon="el-icon-document" @click="handleDownload">
            Export Zip
        </el-button>
        <el-table v-loading="listLoading" :data="list" element-loading-text="拼命加载中" border fit highlight-current-row>
            <el-table-column align="center" label="ID" width="95">
                <template slot-scope="scope">
                    {{ scope.$index }}
                </template>
            </el-table-column>
            <el-table-column label="Title">
                <template slot-scope="scope">
                    {{ scope.row.title }}
                </template>
            </el-table-column>
            <el-table-column label="Author" width="95" align="center">
                <template slot-scope="scope">
                    <el-tag>{{ scope.row.author }}</el-tag>
                </template>
            </el-table-column>
            <el-table-column label="Readings" width="115" align="center">
                <template slot-scope="scope">
                    {{ scope.row.pageviews }}
                </template>
            </el-table-column>
            <el-table-column align="center" label="Date" width="220">
                <template slot-scope="scope">
                    <i class="el-icon-time"></i>
                    <span>{{ scope.row.display_time }}</span>
                </template>
            </el-table-column>
        </el-table>
    </div>
</template>

<script>
    import { fetchList } from '/vue/api/article.js'
    import { export_txt_to_zip } from'/vue/vendor/Export2Zip.js'
    module.exports = {
        name: 'ExportZip',
        data() {
            return {
                list: null,
                listLoading: true,
                downloadLoading: false,
                filename: ''
            }
        },
        created() {
              this.fetchData()  
        },
        methods: {
            async fetchData() {
                this.listLoading = true
                const { data } = await fetchList()
                this.list = data.items
                this.listLoading = false
            },
            handleDownload() {
                this.downloadLoading = true
                    const tHeader = ['Id', 'Title', 'Author', 'Readings', 'Date']
                    const filterVal = ['id', 'title', 'author', 'pageviews', 'display_time']
                    const list = this.list
                    const data = this.formatJson(filterVal, list)
                    export_txt_to_zip(tHeader, data, this.filename, this.filename)
                    this.downloadLoading = false

            },
            formatJson(filterVal, jsonData) {
                return jsonData.map(v => filterVal.map(j => v[j]))
            }
        }
    }
</script>
